Improvement in paper-cutting machines



3 SheetsSheet1 G- R. CLARKE.

PAPER-CUTTING MACHINE. I No. 184,699. Patented Nov.28, 1876. Q

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G. R. CLARKE. PAPER-CUTTING MACHINE.

No..184,'699. Patented Nov. 28,1876.

N. FEIERS, PHOTO'L-ITHOGRAPHER. WASHINGTON. D C.

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3 Sheets-Sheet 3., G. R. CLARKE.

PAPER-CUTTING MACHINE. No.184,699. I Patented'No'v.28,1876.

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N.FE|'ERs, PHOTO-LITMOGRAPHER, WASHINGTON. D c.

GEORGE R. OLARKE,OE BROOKLYN, NEW YORK, ASSIGNOR TO PREsTONf VAN HORN AND CHARLES ORANSTON, OF SAME PLACE.

IMPRO VEMENT IN PAPER-CUTTING MACHINES.

Specification forming part of Letters Patent No. 184,699, dated November 28, 1876; application filed April 6, 1876.

To all whom it may concern;

7 Be it known that I, GEORGE E. CLARKE, of Brooklyn, county of Kings, and State of New York, have invented a certain new and useful Self-Clamping Paper-Cutting Machine,

of which the following is a description:'

This invention consists in such combination of a clamp for holding the paper while being cut and a knife or cutter that said clamp will impinge upon and hold the paper, whatever its quantity, before the knife can operate upon by the driving-shaft may be released from the other mechanism when desirable, and, after having been released, will, at the proper time, automatically re-engage with the said mech anism.

The invention also consists in the combination, with such clutch, of a lever and a cam, whereby, after each cutting operation is completed, and the clamp has released the paper, the driving shaft is automatically disengaged from the other mechanism, and thelatter is locked in position until the lever is manipulated by the operator in charge of the machine, the driving-shaft being meanwhile free to revolve.

The accompanying drawing illustrates a machine embodying my invention.

Figure 1 is aside elevation of such machine. Fig. 2 is a back view thereof. Fig. 3

is a vertical longitudinal section of the same on the plane of the dotted line y 3 Figs. 1 and 4.. Fig. 4 is a transverse section taken on the plane of the dotted line :20 as, Fig. 2. Fig. 5 is a plan of the clutch, lever, and cam, by meansof which the disengagement and engagement of the driving-shaft with the other mechanism are controlled. Fig. '6 is a side view 'of' the same. Fig. 7 is a side view of the clutch-pulleyand clutch. Fig. 8 is a transverse section,

of the same; and Fig. 9 is a view of that side of the clutch-wheel which engages with the sponding parts in all the figures.

The frame of this machine consists of side "pieces A and stretchers or cross-pieces B. O designates the table or feed-board, over which the paper to be cut is fed; and D is a gravitating delivery-board, which is hung from standards E extending from the side pieces A, and automatically adjusts itself to the knife, and receives the cut paper, however;

narrow it may be. F designates a clamp or clamping-bar, working in housings or guides provided in the standards E, so that it mayascendv and descend. G is a knife-bar, working in housings or guides in the side pieces A, so that it may ascend and descend in the same way. H-is a knife, which is carried by the knife-bar, and which, as it ascends and descends,-derives a longitudinal movement from a stationary pin, a, working in an oblique slot, b, and hence operates on the paper with an upward shearing action.

The manner in which the clamp F and knife-bar G are combined for mutual action is an exemplification of the first part of my invention.

I is a rotary shaft supported in bearings at the ends of hangers J suspended from bearings, which are connected to the ends of the knife-bar G. On the ends of this shaft I are large spur-wheels K. Bods L connect the, ends of theclampF with the spur-wheels K, at some distance from their center, or with cranks or eccentrics provided at the ends of the shaft I. M is a secondary or clutch pulley, shaft, which, at the ends, is provided with," pinions gearing with the spur- Wheels Rods N connect this shaft with the shaft and preclude the latter from swinging to and}? fro. 0 is .the driving-shaft.

erated by any suitable means-for instance 1 by a belt on a pulley, Rand it is provided with a pinion, P, which gears with a clutch. spur-wheel, Q, on the clutch pulley shaft M, as will be presently'described more particu-.

larly.

In order to describe the operation of this part of the invention, I will suppose that theclamp F is raised to the fullest extent, and that a pile of paper to be cut is fed over the feed-board (J above' the knife H. When the clamp is thus raised, the points at which the rods L are connected to the spur-wheels K are shaft, the knife-bar and knife, to ascend, their entire weight being supported by the clamp, to which, also, is imparted the strain due to the resistance offered to the knife by the paper; hence the clamp is held on the paperwith a force due to the weight of the cutting.

mechanism and the resistance ofl'ered to the knife. A I

After the knife completes its upward'stroke, the continued rotation of the spur-wheels K causes the cutting mechanism to descend,

and when such mechanism can descend no farther, raises the clamp and permits the paper to be fed forward preparatory to being out again. Thus, not only is the clamp al ways caused to hold the paper with a force corresponding to the resistance ofiered to the knife, but the clamp must come down in place on the pile of paper, be it great or small, be fore the knife can begin to operate, and the knife will movedown below the feedingboard. i I

I do not confine myself to this precise manner of combining the clamp and knife, as obvious mechanical equivalents may be adopted without departing from the principle of this part of the invention. I I

0n the clutch wheel shaft M is -a clutch, which secures thereto the wheel that gears into the pinion of the driving-shaft. This clutch consists of a pulley, S, whose inner face is recessed and provided with a pivoted dog, T, which is capable of interlocking with a notch, o,'in the hub of the spur-wheel Q. U isa bell-crank lever, one end of which engages with the dog T, and the other end of which extends outward through the periphery of the pulley S. A spring,'V, impinging against the inner arm of said lever,causes the dog to en gage with the notch 0 within, the hub of the wheel.

It is obvious that a spring acting directly on the dog would answer the same purpose. Any suitable contrivance may be used to operate the projecting end of the lever U, for the purpose of efi'ecting the disengagement of the clutch-pulley, and hence the cutting mechanism, from the driving-shaft. a I

was

' I have represented a rod, lever, and cam, for this purpose and will now describe them. W is a rod, fitted upon the shafts I and M, and .slotted to provide for its longitudinal movement, irrespective of them. This rod is pro-. vided with two projections, one, d, projecting over the periphery of the clutch-pulley S, in the way of the projecting end of the lever, and another, against the periphery of a cam, Z, arranged onthe shaft 1. This rodW is operated by means of a lever, X. A spring, Y, applied to said lever X, holds the projection 0 against the cam Z. The shape of this cam is such that; after each cutting operation is completed and the clamp is raised from the paper, the projection e slips into a recess ornotch, f the 1' projection d obtrudes itself in the way of the leases the clutch pulley shaft and mechanism ;from'-the wheel Q, which is operated by the driving-shaft O, and the latter to rotate freely.

; t'er eachf cutting operation.

. Tostart the machinery again, the person in 1 charge of the machine operates the lever X lto withdraw the projections from the recess or notch f, and the projection d being removed from contact with the clutch-lever allows the clutch to reconnect the machinery with the driving-shaft. In this way ample time is atiforded for feeding the paper between each cutting operation.

to secure by Letters Patent, is-- 1. A clamp-bar, F, and knife H, coupled I together, and combined with mechanism, subposite directions by a single operation, where- 'by the pressure of the clamp becomes equal to the pressure required to force the knife through the paper, substantially in the mau ner described.

2. A clamp-bar, F, coupled eccentrically to a shaft, I, the bearings whereof are capable of a vertical movement, combined with a knife, H, coupled directly to said shaft I, \vherebya revolution of said shaft forces said clamp downward upon thepaper to be ward pressure, and the continued revolution of said shaft causes an upward movement of the same and the knife, to sever the 3. The clutch consisting'of the recessedpulley S, the pivoted dog T, the lever U, projcctingfrom the periphery of the pulleys, and a spring for actuating the dog T, in combination with a wheel,Q, having a notched or I recessed hub,c, said wheel being the drivingpinionof apaper-cutter,substantially as herein set forth.

I 4. The combination, withthe clamping and cutting mechanism, of an automatic clutch, S T U V, and a contrivance, d, attached to the rod W for tripping the sameafter each opera;

e, projecting over and bearing a 3 "rojecting endof the clutch-lever U, and re,

1 Thus the machine is automatically stopped af- V What I claim as my lnvention, and desire stantially as described, so as to be moved in op-j severeduntil resistance overcomes the down tion of said mechanism, substantially-as and of said rod W, cam Z, spring Y, and lever for the purpose set forth. X, for operating said rod W, substantially as I 5. The combination of a clutch, S T U V, and for the purpose set forth. the rod W, with its project-ions d and e, the

cam Z, and a spring, Y, for holding the pro- GEO. R. CLARKE. jection 0 against the said cam, substantially In presence'of as and for the purpose set. forth. P. L. VAN DER VEER,

6. The combination, with the said clutch, J. G. CLAYTON- 

